05/30/2007 Env Bd Packet - Laserfiche WebLink

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• • • development process changes the pre - development soil density. Suggest fencing around the new surface water treatment areas before and after construction. No soils should be imported or exported without city approval. Recommendation: Staff recommends that the following staff and Environmental Board recommendations be forwarded to the Planning and Zoning Board for consideration: 1. Sizing must be verified for volume storage, runoff rate and infiltration requirements on proposed infiltration and storage ponds. 2. All infiltration areas must be protected from construction as part of the Storm Water Pollution Prevention Plan. 3. All infiltration, pond, and disturbed wetland areas must be planted with the City native seed mix and managed by a company listed with the Minnesota DNR as recommended for such work for a period of at least 3 years. 4. Plan should show access for pond and infiltration area maintenance. 5. Suggest that all houses direct runoff from impervious to pervious grass areas through the use of downspouts. 6. A temporary sediment pond should be installed somewhere on the site that will accept construction water from storm events. 7. Suggest that the developer prepare a brochure for new home owners. The brochure should discuss the importance of water treatment and that some areas may be a bit wet after a storm. Other information should include Shoreland Overlay district restrictions on vegetation removal. 8. A number of modifications to the SWPPP have been identified and will need to be incorporated into the final plan as identified in the attached SWPPP memo. 9. Developer should check with the Minnesota DNR on how to develop with National Heritage concerns in the area. 10. Because of the rare features concerns and the shoreland overlay district, a conservation easement should be drafted that is contiguous with that of Marshan Meadows. Literature should be given to new residents notifying them of the easement and the reasons for it. Conservation easement signs should be placed along the easement line with at least one sign per frontage of easement. The sign should state that "no cutting, planting, filling or excavating should occur within the easement." 11. No soils should be imported or exported without city approval 12. The developer has submitted a Storm Water Pollution Prevention Plan (SWPPP). The SWPPP must be approved and implemented prior to the commencement of a grading permit. A number of modifications to the SWPPP have been identified and will need to be incorporated into the final plan as identified in the attached SWPPP memo. Attachments: